The Design of Fused Amine/Carbonyl System for Efficient Thermally Activated Delayed Fluorescence: Novel Multiple Resonance Core and Electron Acceptor

被引：269

作者：

Yuan, Yi ^{[1
]}

Tang, Xun ^{[1
]}

Du, Xiao-Yang ^{[2
]}

Hu, Yun ^{[1
]}

Yu, You-Jun ^{[1
]}

Jiang, Zuo-Quan ^{[1
]}

Liao, Liang-Sheng ^{[1
,3
]}

Lee, Shuit-Tong ^{[1
]}

机构：

[1] Soochow Univ, Inst Funct Nano & Soft Mat FUNSOM, Jiangsu Key Lab Carbon Based Funct Mat & Devices, 199 Renai Rd, Suzhou 215123, Jiangsu, Peoples R China

[2] UESTC, Sch Optoelect Sci & Engn, Chengdu 610054, Sichuan, Peoples R China

[3] JITRI, Inst Organ Optoelect, Suzhou 215211, Jiangsu, Peoples R China

来源：

ADVANCED OPTICAL MATERIALS | 2019年 / 7卷 / 07期

基金：

中国国家自然科学基金; 国家重点研发计划;

关键词：

aromatic diketone; multiple resonance effect; organic light-emitting diodes; TADF emitter; thermally activated delayed fluorescence; LIGHT-EMITTING-DIODES; EXTERNAL QUANTUM EFFICIENCY; MOLECULAR DESIGN; BLUE;

D O I：

10.1002/adom.201801536

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Multiple resonances induced thermally activated delayed fluorescence (MR-TADF) has great advantages in high color purity display. Up to now, current MR-TADF emitters are only based on the boron-nitrogen-containing fragment. Reported herein is a novel class of MR-TADF emitter, quinolino[3,2,1-de]acridine-5,9-dione (QAO), realized by the opposite resonance effect of the carbonyl and the nitrogen atoms, which is also the smallest TADF emitter reported so far. The QAO-based pure blue organic light-emitting diode achieves a maximum external quantum efficiency (EQE(max)) of 19.4% with a small full width at half maximum of 39 nm. Moreover, tert-butyl modified QAO can be employed as an efficient electron acceptor to construct an efficient yellow-green evaporation and solution process feasible TADF emitter, 7-(tert-butyl)-3,11-bis(9,9-dimethylacridin-10(9H)-yl)quinolino[3,2,1-de]acridine-5,9-dione (QAO-DAd), with significantly improved performance as compared to the previous flexible diketone-based emitters.

引用

页数：6

共 31 条

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